/*
*********************************
*SLIDESHOW by Pier Gorelli		*
*contatto djpierre@jumpy.it		*
*contattare l'autore per ogni	*
*eventuale utilizzo				*
*********************************
*/
var maxPos1=100;
var maxPos2=360;
var velocita = 20;
var curLayer=0;
var nLayer=6;
var nextLayer;
var prevLayer;

function init(vel,current,n)
	{
	velocita = vel;
	curLayer=current;
	nLayer=n;
	}

function muoviAvanti()
{
if (pos1>-160)
	{
	pos1 -=velocita
	pos2 -=velocita
	if (pos2<maxPos1)
		pos2=maxPos1;
	if (document.all)
		{
		doc1=eval("document.all.float" + curLayer);
		doc2=eval("document.all.float" + nextLayer);
		doc1.style.left=pos1;
		doc2.style.left=pos2;
		}
	if (document.layers)	
		{
		doc1=eval("document.layers.float" + curLayer);
		doc2=eval("document.layers.float" + nextLayer);
		doc1.left=pos1;
		doc2.left=pos2;
		}
	if (document.getElementById && !document.all)	
		{
		doc1=eval("document.getElementById('float" + curLayer + "')");
		doc2=eval("document.getElementById('float" + nextLayer + "')");
		doc1.style.left=pos1;
		doc2.style.left=pos2;
		}
	setTimeout("muoviAvanti()",20);
	}
else
	{
	curLayer =nextLayer;
	}

}

function avanti()
{
if (curLayer+1<=nLayer)
	{
	nextLayer=curLayer+1;
	pos1=100;
	pos2=360;
	muoviAvanti();
	}
}

function muoviIndietro()
{
if (pos1<100)
	{
	pos1 +=velocita
	pos2 +=velocita
	if (pos1>maxPos1)
		pos1=maxPos1;
	if (pos2>maxPos2)
		pos2=maxPos2;
	if (document.all)
		{
		doc1=eval("document.all.float" + prevLayer);
		doc2=eval("document.all.float" + curLayer);
		doc1.style.left=pos1;
		doc2.style.left=pos2;
		}
	if (document.layers)	
		{
		doc1=eval("document.layers.float" + prevLayer);
		doc2=eval("document.layers.float" + curLayer);
		doc1.left=pos1
		doc2.left=pos2;
		}
	if (document.getElementById && !document.all)	
		{
		doc1=eval("document.getElementById('float" + prevLayer + "')");
		doc2=eval("document.getElementById('float" + curLayer + "')");
		doc1.style.left=pos1;
		doc2.style.left=pos2;
		}
	setTimeout("muoviIndietro()",20);
	}
else
	{
	curLayer =prevLayer;
	}

}


function indietro()
{
if (curLayer-1>-1)
	{
	prevLayer=curLayer-1;
	pos1=-160;
	pos2=100;
	muoviIndietro();
	}
}